Found on mennonite girls can cook
We quite enjoy throwing several kinds of berries together to make a pie or a crisp. Why not combine a few varieties of berries to make bumbleberry jam? I used blackberries, blueberries and raspberries...equal amounts of each...and we quite enjoyed the combo.
* 6 cups berries, crushed with a potato masher or pulsed in the food processor or blender
* 1/2 cup water
* 4 cups sugar, divided
* 1 box Certo Light pectin crystals (If you prefer a runnier jam, use only half the package of pectin.)
* 1 teaspoon butter, optional (prevents jam from foaming)
1. Place crushed berries and water in a large pot. (Add water to berries when processing in blender.)
2. Combine pectin crystals with 1/4 cup of the measured sugar. Add to prepared fruit.
3. Bring mixture to a boil over high heat, stirring with a long wooden spoon.
4. Add remaining sugar and 1 teaspoon butter.
5. Return to a hard boil; boil while stirring for one minute.
6. Remove from heat. Stir for several minutes to prevent fruit from floating.
7. Pour into warm sterilized jars* to 1/4" from top.
8. Cover with lids and screw rings on tightly.
*Wash jars and lids in hot soapy water and rinse well. Sterilize jars, lids and rings by placing in a large baking pan and placing in oven at 225ºF for 10 minutes. Keep warm until filling time. By using warm jars and hot lids, the jam jars will seal without processing in a hot water bath. (According to the Kraft Certo guidelines... however it is recommended by USDA guidelines to process jams in a boiling water bath for 10 minutes ~~per Canning Granny) Cooked jams and jellies can be stored on the shelf unopened for 6 to 8 months.